Method for determining reserved tones and transmitter for performing PAPR reduction using tone reservation
a technology of reserved tones and transmitters, applied in the direction of transmitter monitoring, transmission path division, multi-frequency code systems, etc., can solve the problems of degrading the performance of transmission and/or reception systems, distorted ofdm signals, etc., and achieve the effect of efficient reducing papr
Active Publication Date: 2018-04-03
SAMSUNG ELECTRONICS CO LTD
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Benefits of technology
[0024]According to various exemplary embodiments, when PAPR reduction is performed, it is possible to prevent a new peak from occurring, thereby more efficiently reducing a PAPR.
Problems solved by technology
An OFDM signal having a very high PAPR deteriorates efficiency of a high power amplifier and the high power amplifier is operated in a non-linear region out of a linear operation range thereof, and thus, the OFDM signal is distorted.
Accordingly, there is a problem that performance of a transmission and / or reception system is degraded.
However, the exemplary embodiments are not required to overcome the disadvantages described above, and may not overcome the above problem described above.
Method used
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Embodiment Construction
[0034]Hereinafter, the exemplary embodiments of the inventive concept will be described in more detail with reference to the accompanying drawings.
[0035]The exemplary embodiments relate to a method for reducing a PAPR using a tone reservation (TR) scheme, in a system in which a signal is transmitted by an OFDM scheme. Particularly, according to the exemplary embodiments, in order to efficiently reduce a PAPR while avoiding collision with pilots by considering positions of carriers in which the pilots exist in an OFDM symbol, carriers of specific positions are used as reserved tones.
[0036]First, a method for reducing a PAPR according to a tone reservation method is as follows. In the tone reservation method, tones are reserved for some of carriers. Here, the reserved tones do not transmit data and are used to reduce a PAPR. In this case, since a receiver neglects the reserved tones which do not transmit data and restores the data only from a signal at a tone position of data, there i...
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A method of determining reserved tones to be used for reduction of a peak to average power ratio (PAPR) of a signal includes: randomly selecting carrier indices for the reserved tones and generating a kernel signal based on the randomly selected carrier indices; calculating a comparison reference average value of the kernel signal, comparing the calculated comparison reference average value with a prestored comparison reference average value, and preliminarily determining carrier indices of the reserved tones based on the comparison; randomly re-arranging an order of the preliminarily determined carrier indices of the reserved tones; and calculating the comparison reference average value while changing each of the re-arranged indices of the reserved tones, and finally determining carrier indices for which the calculated comparison reference average value becomes the smallest value as carrier indices of the reserved tones.
Description
CROSS-REFERENCE TO THE RELATED APPLICATIONS[0001]This application claims priority from U.S. Provisional Application No. 62 / 172,851 filed on Jun. 9, 2015 and U.S. Provisional Application No. 62 / 209,402 filed on Aug. 25, 2015, and Korean Patent Application No. 10-2016-0016379 filed on Feb. 12, 2016, the disclosures of which are incorporated herein by reference in their entirety.BACKGROUND[0002]1. Field[0003]Apparatuses and methods consistent with the exemplary embodiments of the inventive concept relate to a method of determining reserved tones and a transmitter performing peak to average power ratio (PAPR) reduction using tone reservation, and more particularly, to a transmitter determining carrier indices reserved for PAPR reduction and performing PAPR reduction using tone reservation.[0004]2. Description of the Related Art[0005]Recently, broadcast and communication services become multi-functional and wideband high quality. Also, in accordance with the development of electronic tec...
Claims
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IPC IPC(8): H04L27/00H04L27/26H04B1/04H04B17/10H04L5/00
CPCH04L27/262H04B1/04H04B17/10H04L5/0007H04L27/2618H04L27/2628H04L5/0005H04L5/0048
Inventor PARK, JOO-SUNGOH, YOUNG-HO
Owner SAMSUNG ELECTRONICS CO LTD